Repeatable synthesis of (Bi/sub 2/Te/sub 3/)/sub 5/(TiTe/sub 2/)/sub 4/ superlattices using modulated elemental reactants
Mary SmellerFred R. HarrisDavid C. Johnson
Abstract
Reliable synthesis techniques are essential for industrial thermoelectric applications. The modulated elemental reactant (MER) method was used to make a set of seven (Bi/sub 2/Te/sub 3/)/sub 5/(TiTe/sub 2/)/sub 4/ superlattices, with a superlattice period reproducible to within 0.6%. The electrical properties of these samples were controlled by the distribution and densities of defects. Annealing at 270/spl deg/C changed the Seebeck coefficient from -60 /spl mu/V/K to -200 /spl mu/V/K after 111 hours annealing at 270/spl deg/C.
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